A running game is different than a running back. A running game is helped by a good oline, a good scheme , and the threat of a decent passing game. The starting RB's in the Super Bowl this year were Damien Williams and Raheem Mostert. Both were undrafted free agents. You can find RBs everywehere and plug them into a good system or a good team. They might not be Tomlinson or Faulk, but good enough to win. It's all about team salary distribution and lifespan/durability. You take a RB in round 1 and pick up his 5th year option. By that time(2nd contract)that player is 26 or 27 with a lot of miles on the tires. That age is young for every other position. If you are an RB, you are already on the back 9 of your career. This isn't even taking into consideration that the position has the highest major injury risk of all the positions. In the 1980's RBs were king. Now they are at the bottom ofnthe food chain along with Strong Safeties, a 3rd starting linebacker, and guards. There are exceptions like McCaffrey and perhaps Barkley or Zeke but the vast majority of GMs just don't want to invest a huge amount in 1 high priced RB with a short shelf life than can blow a knee on their next cut. They prefer multiple backs where youth and affordability are major considerations. Now QB's, pass rushers, cover corners, Left tackles, #1 WRs are the premium positions.